<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.10/dist/vue.js"></script>
    <style>
        .one {
            width: 100px;
            height: 100px;
            background-color: yellow;
        }

        .two {
            width: 100px;
            height: 100px;
            background-color: hotpink;
        }

        .three {
            width: 100px;
            height: 100px;
            background-color: red;
        }

        .active {
            color: skyblue;
        }
    </style>
</head>
<body>
    <div id="app">
        <div :style="{color:'red',fontSize:'30px'}">AAAA</div>
        <!-- 可直接引用 -->
        <div :style="boxStyle">BBBB</div>
    </div>
    <script>
        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    boxStyle: {
                        color: "pink",
                        fontSize: "40px",
                        fontWeight: "bold",
                    }
                }
            }
        })
    </script>
</body>
</html>